14 lands seems fine, as you are running the Opals and Drums. I couldn't find any list running more! Also, I am not running Blinkmoth as I am potentially playing 5 colors, so I wanted to cut down on my colorless sources. Do you think it is a mistake? Are the Blinkmoths really needed?

well im not the best guy to say, since i haven't played affinity since standard lol. 14 just seemed low but if thats what most lists are running then i'd do with it. i think blinkmoth is worth is an extra artifact for affinity/metalcarft, also its another creature that evades board wipes and can carry ravager tokens. Again not an affinity expert, just my 2 cents.

also... master of ethernium might not be as good as say shrapnel blast?... i just think 3cmc is a tad slow but then again i guess it would help you keep more opening hands... i just see it as the least aggro dude on the list